Now that we understand what SSH certificates are and how they are used, let's look at how they differ from X.509 certificates.
Check out our blog about SSH Certificates versus X.509 Certificates, and how to use Smallstep for issuing both SSH and X.509 certificates using Certificate Manager.
SSH Professional and Certificate Manager are separate features. Using SSH on Certificate Manager is a separate feature from SSH Professional.
If you're interested in generating and issuing SSH certificates with Certificate Manager, please contact support to enable the feature.